基于激光点云的高墩垂直度偏差分析方法

现代桥梁工程中高墩桥梁屡见不鲜,桥墩垂直度已成为评定桥墩施工质量的重要指标之一.以新疆某特大桥项目为依托,针对高墩垂直度检测结果实用性低的问题,提出一种采用三维激光扫描技术对高墩垂直度进行非接触测量分析的方法.利用三维激光扫描仪快速获取高墩结构全局点云信息,对桥墩点云进行拼接、降噪等预处理,采用编程算法实现了桥墩节段中心点和垂直度偏差的计算,并得到了垂直度偏差变化规律图.最后将该方法与传统方法进行对比.结果表明:利用三维激光扫描技术对高墩进行快速测量,能够获取桥墩中心轴线的三维空间线型,精确分析并定位最大偏差位置,显著提高垂直度测量结果的实用性,具有良好的工程应用前景,并为后续研究桥墩垂直度问题提供了新思路.     

小议劲性钢筋混凝土柱施工工艺

以某楼局部劲性钢筋混凝土柱施工工程为例,介绍了劲性钢筋混凝土柱的施工工艺流程,并介绍了该施工工艺在该工程施工应用中取得的施工效果。     

超深全岩地质复合接力钻孔灌注桩施工

本文介绍了流溪河特大桥钻孔灌注桩施工的实例,并针对钻孔过程中出现的护筒底口漏浆,超深全岩地质孔垂直度易超标,基岩过硬对钻具破坏严重,直径2.5m超深桩灌注等问题进行了探讨。     

烟囱施工控制的重点及常见质量问题的防控

烟囱作为高耸构筑物,其中心桩的测量控制、大体积砼基础的施工、筒壁中心线垂直度的控制及滑升、调径、模板收分和抽拔均是施工控制的重点。在筒壁滑模施工中易出现筒壁混凝土坍落、混凝土筒壁表面存在局部裂缝及滑模施工中易出现偏扭等现象,施工如果控制不利,将造成筒体倾斜、筒身混凝土强度降低等质量问题,严重的可能造成质量事故。     

烟囱施工控制的重点及常见质量问题的防控

烟囱作为高耸构筑物，其中心桩的测量控制、大体积砼基础的施工、筒壁中心线垂直度的控制及滑升、调径、模板收分和抽拔均是施工控制的重点。在筒壁滑模施工中易出现筒壁混凝土坍落、混凝土筒壁表面存在局部裂缝及滑禚施工中易出现偏扭等现象，施工如果控制不利，将造成筒体倾斜、筒身混凝土强度降低等质量问题，严重的可能造成质量事故。     

VERTICAL GEOGRAPHIES,POLYVOCALITY AND THE EVERYDAY IN A DIVIDED CITY

The vertical turn in urban scholarship is a critique of the overly horizontal perspectives used in studying cities in academic research. This article broadens this scholarship by engaging with the ways that horizontal perspectives on urban conditions dominate not only scholarly perspectives but also professional responses to urban change. By drawing on research in the divided city of Mostar in Bosnia and Herzegovina, it argues for a ‘polyvocal’ approach to studying professional responses to urban conditions, one that facilitates a productive juxtaposition of those responses with city dwellers’ everyday engagements with the vertical qualities of the built environment. It also seeks to understand how vertical geographies—here, tall landmarks—in divided cities are seen as part of the complex urban realities of city dwellers in strategies of urban planning and heritage-making related to postwar reconciliation. These findings are compared with ethnographic data about how people make sense of tall landmarks in divided cities and how they experience and interpret them in relation to senses of togetherness and belonging to divided cities. By putting these two lines of research in a dialogue, the ‘polyvocal' approach offers a way to rethink conventional strategies of urban reconciliation and taken-for-granted ways of conceptualizing cities.